Engine



(No Model.) 2 sheets -sheet 1. O. W. BALDWIN.

GAS ENGINE.

No. 288,396. Patented Nov. 13, 1883.

WIT-NEAS'SES IJV'VENTOR Attorney 5 Illinois, have-invented oertainnew anduse stitutethe cylinder ofa gas-pump, D,= provide NlT ED STATES oYRUsIWJBLLDWE. OF mm), lLLmolsAssm-xoml l HALE,OFSAMElLACEJ srnczncewion"ror insnsft of Letters Patent No. 288,396, aated iv vemfier spisssj Application filed April Hull-SW (Nopimk-l.) M I 1'.

.To all whom it may concern.- In constructing an engine toppei'hte'in-this 5o" Be it known that I, CYRUS W. BALDWIN, manner I may inake useofthe exhaust-to draw a citizen of the-United States, and aresident of in the measured gas-charge; Thus in Fig. 1'. Ohicago,.in the countyof Cook and Stateof the rear head, A, of the cylinder Amay mu ful Improvements in Gas-Engines, of which with a trunk-piston, E, thrown forward by a: 55' the following is a. specification. spring, h, (01 by the pressureiofi the external My invention has'forits main objectsto atmosphere,)a gas'pipe, F,1containingacheck'- e simplify the construction and operation of gasvalve, comrnpnicatingwiththe'puinprcylinderi, l 1o engines and economize, power; and these Let and passagesfi extending. from the. latter to feet by makingJthe spent gases exhaust them thein'ner face of the head A}, where they are 6o, Selves, from the cylinderand bydrawingin'the closed by an nunplat-valve,m.,1- new chargebyamexhausting action,'and f TheYexhaustport iris attheforwa'nd ell-Lpf the useofautomaticmechanism for measuring the main cylindep, and is uhooveredasyt'hex r 5 and introducinglthe gas-charge, all as fullydepiston rezichesitsforward position, and the e scribed hereinafter, and illustrated in the air-inlet portfllis at the oppositeend,and-p303L65. Y companying drawings, in which v videfdlwit-h aninlet-valve, V,,asphinghold- Figure 1 is .a longitudinal section of afgas ing'the latter to its seatm Then the port :10 is .1 1 engine illustrating myimprovement-s; 5-Fig. 2 uncover-ell, the gases. rush ,out, and, continu--. w

2o isalongitudinal section, showing-another form ing their movement after thepressure is re cylinder of'a. gastenfgine, it is necessary to get and ait-Jwhih is thus measuredofi", and as the other devices for forcing out the'gases, or the 'piston,'and by expelling the gas through the s of engine, ejecting device, and measuring de- (lueed, draw the air through the port'llinto vice difi'ering fromthat shown in Fig. 1. Fig. the cylinder. \Vhcnthe pressure is'ncduced, 3 is a cross-section on the line 1 2,,Figu2: l thepiston E 'inoves forward and-draws int Alter the. gee-charge has exploded in'tlie the pumpcylindei' quantity 0f. as, (or gas:

this. necessityhasinmany forms of engines inder is compressed until thepres'sur e on the greatly detracted 'fromthe efiloiency thereofpiston E, which isgr eatejr iin area t-han the i by requiring thesernployment of pumps or -valve m, becomes sufficient to nove backflthe rid of the spent-gases in ,whole orpart, and mainpistoninovesbaok, the air in the main cyla-- use of the backward movement of the main channels G .raises'tlie valve m1 d eIimits theepiston, so thatitis not possible to explode .a gas to mix. under pressure'with the air in the charge to eac discovered that byproviding the cylinder'withpositioniintil afterthe explosion andescape .1

3 5 an inlet-port and valve opening inward atone of thespent gases. The pressure int-he cylin l -40 they will continue to flow after, the pressure or morcprolon'g'ed exhnustih "effect, Iluse an.

45 baekwardmotionofthe piston. Bythismeans or any, other motor fluid maybe employed.

end and with amexhaust-port attheother, der is then reducedfwhen thespring or supeand by opening the. latter suddenly, the spent rior atmospheric pressure will throw. it,fo,rtr gases will rushout with great velocity, and ward. j ,jj Q ,1

will thereby acquire such a. momentum that \Vhere it is desirable tosecu'fie a'strongen'. 1a a within the cylinder has ,beeenfielequnl to that I ejecting. device which is incomrnunication of the atmosphe'rc,'apd that this continued with the-'exhaust-port; jQThefmotoIf-fluid in U motion will open the inlet-"awe and. drawn such case may be steam genera-tedhy the sun fresh charge of airinto the cylinder prior to the plus heat of the wnste-gasesfrom the cylinder;

I clear the c ylinder'of gases and supplythe I prefer,however, to nse one portion of the Y fresh alr oharge'without the use of usual spent 'gasesasamotor-fluid for theremninder f pumping appliances, and without using the A construction suitable for this purpose is;,

main piston for expulsion. shown in Figs. '2 and 3, iirjjwllich there;are .1

outward movement. Ihave cylinder. Thepiston E keeps itsbackward two series of exhanst ports, m x, the latter bemg first; uncovered by the piston (or a. positively-actuated valve may he used) to permit a portion of the gases constituting the motorfluid to pass to a channel, to, of an ejector, W, from which chamber the gases flow through an orifice, e, into a central tu'be or channel, a, which is in communication with the exhaust-ports, the latter .being opened as soon as thegases have passed to the orifice e, so that the gases will flow to the tube a, and, meetmg the other stream under pressure and high velocity, will be carried so rapidly outward as to quickly exhaust the spent gases from the cylinder and lift the air-valve V and admit the fresh charge of air. Any other suitable form of ejecting deyice may be used.

In connection with this arrangement I may use an automatic gas measuring and delivery device consisting of a cylinder or other vessel, U, receiving a determined quantity of gas froma-gasrpipe, F, and a cock, S, controlled by the v'alv'e V. The cylinder may contain a loose piston, b, which rises freely when the cylinder is put into communication with the pipe F and descends when the cylinder is in communication-with the cylinder A. The cock S has a circular case and hollow cylindrical plug with ports 13 t, 10 as shown, the plug being-connected by a lever, d, and rod d with the stem of the valve ,V. The ports.

are arranged, as showm'to admit the gas to the measuring cylinder or vessel U when the valve V is down, and to close the communicotiou with the pipe ls and open it between the cylinders U and A when the valve V rises, so that the gas will then flow with the entering air into the rear of the cylinder A- An adjustable stop, Z, regulates the play of thepiston 'b," so that the precise quantity of gas requirediis measured oti" at each stroke.

A flexible. bag of determinate capacity or other flexible vessel may be substituted for the cylindei U, anda slide or lift valve arrangement may be substituted 'for the plugvalvc S, and" such valve may be operated by a piston deriving its motion from the varying pressure within the cylinder .A,,instead of from the valve V. v i

I do not claim matter claimed in my application No. 91,385, and shown also herein.

I do not abandon or dedicate to'the-rpublic any patentable featureg set forth herein and not hereinafter claime but reserve the right to claim the same either in a reissue of any patent that may be granted upon this application or in other applications for Letters Patcut that I may make.

I therefore claim- 1. A gas-engine provided with an exhaustport near one end of the cylinder, an air-inlet port near the other endof the cylinder, and

with appliances, substantially as described,

whereby the opehing of the exhaust to the exair through the air-port. substantially as described.

2. The combination, in a gas-engine, of a cylinder having air and gas inlet ports and valves, an exhaust-port, and applianee,'snbstantially as described, whereby the outward flow of the spent gases is made the means of opening the air and gas vaives-aml of admit ting the fresh charge to the cylinder.

3. The combination, with agas-engine, ot a gas-measuring vessel communicating wit-h a gas pipe and valve, an air inlet port and valve, and, appliances, substantially as described, whereby the reduction of pressure within the cylinder adjusts the valves to admit a measured quantity of gas with ail-into the cylinder to constitute the how charge, substantially as setforth.

4. The combination of the working-cylinder of ages-engine, air-valve, gas pipe and valve, and measuring-vessel, and connections, sub stantially as described, whereby the movement of the air-valve under the change of pressure within the cylinder is the means of adjusting the gas-valve to pass gas to and from the measuring-vessel, substantially as described.

5. The mode described of facilitating the mosphere, substantially as set forth.

6. The combination, with t-he cylimler of a gaseu'gine, of an ejector device in commuuication with exhaust-ports arranged to divide the spent gases, and channels whereby one of the gases is carried into the ejector to constitute the motor-fluid of the other portion of the gases, substantially as set forth.

der against thepressure of the external at- 7. The combination, with the gas-engine cy-t inder, of an ejector device outside the cylinder, and pipe whereby a motor fluid under pressure is admitted thereto, thereby forcibly expelling the spent gases, and an air inlet and valve arranged to admit a fresh charge of air as the spent gases are exhausted, substautiallv as set forth. I

1 8. The combination, with a gas-engine, of an ejector outside the cyliuder,prov idcd with a passage admitting a motor-fluid under pressure thereto, and communicating with the exhaust-port to remove the spent gases, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two sub;

scribing witnesses.

CYRUS W. BALDWIN.

Witnesses:

HOLMES Hoes, JNO. J. AKIN. 

